Paper-coating apparatus.



No. 684,282. Patent ed Oct. 8, 19m.

A. MASSON & R. SCOTT.

PAPER COATING APPARATUS.-

(Application filed July 19, 1901.) (No Model.) 2 Sheets-Sheet I.

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A MASSDN &. R SCOTT PAPER COATING APPARATUS (Apphcatxon filed July 19, 1901 (No Model) UNITED STATES PATENT OFFICE.

ANDRE\V MASSON AND ROBERT SCOTT, OF LONDON, ENGLAND.

PAPER-COATING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 684,282, dated October 8, 1901.

Application filed July 19,1901. Serial No. 68,923. (No model.)

To all whom it may concern:

Be it known that we, ANDREW MASSON and ROBERT SCOTT, subjects of the King of Great Britain and Ireland, and residents of London,

England, have invented certain new and useful Improvements in Paper-Coating Apparatus, of which the following is a full, clear, and exact description.

This invention relates to improved apparatus for coating paper films and the like with photographic emulsions or other liquid preparations, the apparatus being also applicable for other analogous uses where absolute accuracy of and perfect coating is essential.

The apparatus is characterized by the combination in cooperative relation of a braked roll of the paper film or the like, (hereinafter referred to as paper,) an adjustable driven cylinder for supporting the paper while being coated and causing the coating to set, an adjustable tray for holding the emulsion or otherliquid preparation (hereinafter referred to as emulsion) to be applied to the paper, a driven roller for applying the emulsion to the exact required width of the paper while the latter is being carried around by the cylinder, and adjustable runners for holding the coated paper by its edges to the cylinder until it leaves the latter, such elements being respectively adapted as hereinafter more fully described with reference to the accompanying drawings, on which Figure 1 represents an end elevation of the apparatus, showing the relative locations of the said parts and their respective adjuncts. Fig. 2 represents a plan View. Fig. 3 represents a front elevation of the coating-roller, paper-supporting cylinder, and holding-runners detached from their supports; and Fig. 4 represents a transverse section of the emulsion-tray.

. a represents the apparatus-framework, which is adapted to support the various operative parts by which the paper is treated by suitable bearings, as represent-ed.

1) represents the paper to be coated, which passes from a roll I) thereof to a leadingroller 0, thence around the paper-supporting and emulsion-setting cylinder d between such cylinder and the coating-roller e and holding-runners f, respectively, as hereinafter more particularly described. The paper-roll spindle b is supported by bearings a, provided with an adjustable spindle-brake b adapted to cause the paper to be coated to be kept taut. The spindle o of the roller 0 is supported by bearings a The cylinder d, which serves to support the paper while it is being coated and to cause the coating to set, is made of copper or other suitable metal and is hollow and provided with any suitable means of supplying it with a suitable liquid medium for keeping it sufficiently cool to cause the coating applied to the paper to cool sufficiently for it to set before the paper leaves the cylinder. The cylinder is supported by bearings 61, which are carried by frames d mounted on a cross-shaft d which is supported by bearings a at each end of the machine. The cylinder is driven by means of a pulley d (shown in dotted lines in Fig. 1,) keyed to its spindle, the drivingbelt d being led laterally to and from the pulley by pulleys d, (shown in dotted lines in Fig. 1,) which are adjustably mounted in bearings a, and so guide the belt as to prevent any upward or downward strains on the cylinder, which would tend to affect the regularity of the coating.

The frame a is provided with fine-thread screws d, which enable the operative position of the cylinder-supporting frames d to be accurately determined, and the latter frames are provided with fine-thread screws (1 which enable the cylinder-bearings d to be micrometrically adjusted therein, the screws d 01 thus cooperating in enabling the position of the cylinder 61 in relation to the coating-roller e to be accurately determined. The shaft (1 is fitted at one end with a lever d, which is pivotally coupled to a nut 61 working on a screw (Z which is supported by bearings a and actuated by a hand-wheel d in such a manner as to enable the as-previously-described adjusted cylinderto be raised from the coating-roller and lowered to its correct position in relation thereto without affecting such adjustments.

Both the cylinder d and the roller 6 are accurately trued up to fit each other properly. They are not in contact when in operation, but are apart by the thickness of the paper to be coated. The emulsion therefore does not touch the cylinder, but remains on the coating-roller, from which it is imparted to the downward face of the paper while the latter is supported by the cylinder.

The coating-roller e is covered with indiarubber or other suitable material not liable to affect or to be affected by the emulsion used. Its spindle e rests in fixed bearings a fitted with hinged covers a", and is connected by couplings e with its driving-shaft e which is supported in bearings e carried by a frame 6 connected to the frame a, and is driven by coned pulleys 6 e the former of which is pulley-driven and drives the latter and which enable the coating-roller to be driven at a speed suitable to the amount of coating required upon the paper.

The bearings a a, and couplings e enable the coating-roller to be speedily removed and replaced by another roller ofa diilerent width, the roller used being of the exact width of the coating required to be applied to the paper. The coating-roller runs in a tray 68, which is plated or coated with silver or other suitable material not liable to aifect or to be afiected by the emulsion used and is made of the shape represented and with a gate a, under which the emulsion, which enters the tray at one end, is caused to pass, so that it will rise to its level in the tray under the coating-' roller regularly without agitation and free from air-bells. The tray rests-in and upon a box 6 made of copper or other suitable metal and fitted with hot-water or steam pipes e and charged with water, which is heated by means of said pipes sufficiently to keep the emulsion in the tray at its proper coating temperature. The box 6 rests upon a plate e which extends across the machine and is raised and lowered at its ends by means of screws e actuated by a hand-wheel c and connecting-gearin g 6 The holding-runnersf, which aid in keeping the coated paper taut against the cylinder while and after being coated, are made of metal covered with india-rubber and sufficiently heavy to hold the paper to the cylinder by running on the paper edges. They are adjustably mounted on a spindle f, carried by bearings f rising from the frames d and are set on the spindle at a distance apart equal to the width of and in alinement with the ends of the coating-roller used, and their spindle is provided with a hand-lever f which enables them to be instantly raised from the paper when desired.

An especial advantage attendant on the justments of its parts are so arranged and situated as to be easily worked in the dull light available for photographic coating pur poses. I

What we claim as our invention, and desire to secure by Letters Patent, is

1. In paper-coating apparatus, in combina-. 7

tion, a braked roll of paper, an adjustable driven hollow cylinder adapted to support the paper while being coated and to cause the coating to set before the paper leaves the cylinder, an adjustable tray for holding the emulsion to be applied to the paper and for heating the emulsion to the required coating 7 temperature, a relatively fixed driven roller for applying the emulsion to the required width of the paper being carried aronndby V the cylinder, adjustable runners for holding the coated paper by its edges to the cylinder until it leaves the latter, means ofdifferenr tially driving the coating-roller, and means of '7 driving the paper-carrying cylinder arranged to exert the driving strain in a planeat right angles to the plane in which the centers of the coating-roller and the cylinder are situated, as set forth.

2. In paper-coatin g apparatus, in combination, a hollow cylinder adapted to support the paper while being coated and provided with means of cooling itinternally sufiiciently to cause the coating to set, a tray for holding the emulsion to be applied to the paper and provided with means of heating the emulsion to the coating temperature, a roller for applying the emulsion to the paper being carried around by the cylinder and runners for hold ing the coated paper by its edges to the cylinder, the tray being provided with means of 7 raising and lowering it relatively to the coat.- in g-roller, the coating-roller being removably supported in fixed bearings and provided with means of rotating it, the cylinder being adjustable in its hearings in relation to Z i the coating-roller and being supported in frames provided with means ofindependently V adjusting the same and being provided with means of rotating it, and the holding-runners.

being carried by the cylinder-bearing frames and provided with means of applying them to and removing them from the cylindeig' as set forth.

3. In paper-coating apparatus, in combination, a coating-roller supported by fixed bear-- ings having hinged covers, means of rotating the roller, an emulsion-tray having a rogue lating-gate, a water-bath carrying the emulsion-tray and having means of heating the 7 water and the emulsion, and means of raising and lowering the tray and bath in rela? tion to the coating-roller, as set forth.

4. In paper-coating apparatus, in combination, a hollow cylinder-adapted with means of cooling it internally, bearings supporting said cylinder, screws for adjusting said bear ings, frames carrying said screws, a shaft In testimony whereof we have signed this 10 supporting said frames, bearings supporting specification in the presence of two subscribsaid shaft, a lever connected to said shaft ing witnesses. and screw connections for adjusting said le- T 5 ver-shaft, frames, bearings and carried cylinder, set-screws for determining the adjusted position of the cylinder-carrying frames, and Vitnesses: a frame for supporting said screw-bearings CHARLES AUBREY DAY, shaft-bearings and set-screws, as set forth. I ALFRED CHARLES DAY. 

